Availability can depend on the number type, billing mode, project eligibility, or enrollment in a limited release. A visible SDK method or another customer's screenshot does not establish access for your project. Team permissions still apply independently.
Check the feature's availability message and the correct project. Ask support about the named eligibility or enrollment requirement if it is unclear. Do not change number tiers or buy an add-on unless that requirement actually calls for it. A support code cannot grant access or bypass a disabled feature.